PP

Overview

Polypropylene (PP) has characteristics that are extremely similar to those of the HDPE that sometimes it is difficult to distinguish between the two. PP is often divided into the homo-PP and the co-PP. Although the PP density is extremely small (between 0.9 and 0.94), it is mechanically much stronger and harder than the HDPE, and has better electro-insulating properties. It is also highly chemical-resistant.

Characteristic

• Low specific gravity (0.9 or lower), transparent, 95% crystalline
• Often used as a hard molding material
• Although it is shock-absorbent in room temperature, because it loses its strength against shock in temperatures below -5 degrees Celsius, it requires a grade that is highly shock-absorbent.
• Heat-resistant, wear-resistant
• Waterproof, chemical-resistant
• Smells like gasoline and loses stickiness and printability when combusted.
• Ages slowly under the sunlight and heat
• More affordable and light-weight than the HDPE
• Extremely light, insulates well, and easily workable using machines
• Can be welded or fused.

Applications

• Plating, chemical tank lining, gears, poller guides
• Various ducts and storage tanks
• Electrolytic cell
• Structures and lining of fish breeding grounds
• Footholds and cutting boards